Irwin Tools Irwin Industrial Tools 3046012 2-1/4-Inch 3-Cutter Self Feed Drill Bit

PLUMBING

Used this with an old drill press to drill 2 1/4" wide holes for candle votives for our wedding center pieces. The self tapping screw is extremely aggressive at first so be ready. It grips the wood and pulls itself in (or your log upward) with a force that is hard to control. Once the cutting blades make contact, this thing cuts like butter. You will definitely need an air hose or shop vac to clear your sawdust and wood scrapings, especially if drilling vertically. After 40 holes at a depth of 2 1/2", the bit was still as sharp as it came in the box.

This drill worked great, I had to buy a new and bigger drill to use it. This bit requires a lot of torque, not speed. We used it to drill a 24 inch hole in a carved tree stump. After burning up 2 household drills, we bought a drill that provided high torque and a moderate speed. With that configuration it only took about 10 minutes to get the job done.

I purchased this bit to make candle holders for a wedding decoration. The type of wood made a big difference in how easily the bit cut through the wood. Overall, the bit worked great and the candles received a lot of compliments!I used these candle holders:  Eastland® Votive Holders Clear Set of 72 And the Candles (I averaged a 7-8 hour burn time): Richland Votive Candles White Unscented 10 Hour Burn Set of 72 All three products worked great!

Bought this 2-1/4 inch bit to install a central vacuum line in my house.because of the amount of wood being removed i thought it would bog down. Drilling overhead and down holes it didn't bog,nice clean cuts.also comes with a replaceable worm screw.the worm screw pulls it through the wood.works on 1/2 drive chuck drills straight or right angle.

great quality better than I expected

Well, with the speed screws in the center its ridiculously aggressive. If you're plowing through lumber I'm sure speed would be desirable, but for drilling a nice smooth hole into a hardwood project, not so good. Yes, you can remove the speed screw, but it leaves 1/4" dowel in the center that bottoms out before drilling through 3/4"...

If you need to run a lot of drain pipes, and you need holes in the wood to run said drain pipe - buy this thing, or as I call it "the beast". It will rip through wood like Putin through the tears of babies. My tiny non-Putin sized boy-man arms could barely stand the power as it left behind chunks of wood, piles of sawdust, and my Olympic weight lifting hopes and dreams.

trabajan excelente. no dejan los cortes muy finos, pero si lo que necesitas es perforar, son perfectas.Aclaro, no son para taladros portátiles, a menos que tengas un dewalt dcd996 o algo así enorme, no la compres.son para taladro de bando, los pequeño se atascan y calientan enseguida. Inclusive si usas el dcd996, que sea con bateria de 5 ampers, por que de 3amp para abajo se queman las baterías.En sí, una excelente pieza.